<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script type="module">
        import { reactive, effect, ref } from './reactivity/index.js'
        const price = ref(5000)
        const count = ref(3)
        let total = 0

        effect(() => {
            total = price.value * count.value
        })

        console.log(total)

        price.value = 4000
        console.log(total)

        count.value = 1
        console.log(total)
    </script>
</body>

</html>